Merge pull request #6624 from alv21/BAEL-2426

BAEL-2426 - Cannot reference X before Supertype, exampels

core-java-lang-oop-2/.gitignore

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+target/
+.idea/
+bin/
+*.iml

core-java-lang-oop-2/README.md

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+=========
+
+## Core Java Lang OOP 2 Cookbooks and Examples
+
+### Relevant Articles: 

core-java-lang-oop-2/pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>core-java-lang-oop-2</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>core-java-lang-oop-2</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-java</relativePath>
+    </parent>
+
+    <build>
+        <finalName>core-java-lang-oop-2</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+</project>

core-java-lang-oop-2/src/main/java/com/baeldung/supertypecompilerexception/MyClass.java

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+package com.baeldung.supertypecompilerexception;
+
+public class MyClass {
+
+    private int myField1 = 10;
+    private int myField2;
+
+    public MyClass() {
+        //uncomment this to see the supertype compiler error:
+        //this(myField1);
+    }
+
+    public MyClass(int i) {
+        myField2 = i;
+    }
+}

core-java-lang-oop-2/src/main/java/com/baeldung/supertypecompilerexception/MyClassSolution1.java

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+package com.baeldung.supertypecompilerexception;
+
+public class MyClassSolution1 {
+
+    private int myField1 = 10;
+    private int myField2;
+
+    public MyClassSolution1() {
+        myField2 = myField1;
+    }
+
+    public MyClassSolution1(int i) {
+        myField2 = i;
+    }
+}

core-java-lang-oop-2/src/main/java/com/baeldung/supertypecompilerexception/MyClassSolution2.java

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+package com.baeldung.supertypecompilerexception;
+
+public class MyClassSolution2 {
+
+    private int myField1 = 10;
+    private int myField2;
+
+    public MyClassSolution2() {
+        setupMyFields(myField1);
+    }
+
+    public MyClassSolution2(int i) {
+        setupMyFields(i);
+    }
+
+    private void setupMyFields(int i) {
+        myField2 = i;
+    }
+}

core-java-lang-oop-2/src/main/java/com/baeldung/supertypecompilerexception/MyClassSolution3.java

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+package com.baeldung.supertypecompilerexception;
+
+public class MyClassSolution3 {
+
+    private static final int SOME_CONSTANT = 10;
+    private int myField2;
+
+    public MyClassSolution3() {
+        this(SOME_CONSTANT);
+    }
+
+    public MyClassSolution3(int i) {
+        myField2 = i;
+    }
+}

core-java-lang-oop-2/src/main/java/com/baeldung/supertypecompilerexception/MyException.java

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+package com.baeldung.supertypecompilerexception;
+
+public class MyException extends RuntimeException {
+    private int errorCode = 0;
+
+    public MyException(String message) {
+        //uncomment this to see the supertype compiler error:
+        //super(message + getErrorCode());
+    }
+
+    public int getErrorCode() {
+        return errorCode;
+    }
+}